Electrical soldering device with attachment



March 2, 1948.

u. N. HENSLEY ELECTRICAL SOLDERING DEVICE WITH ATTACHMENT 2 Sheets-Sheet 1 Filed Dec. 27, 1944 March 1948- u. N. HENSLEY ELECTRICAL SOLDERING DEVICE WITH ATTACHMENT Filed Dec. 27, 1944 2 Sheets-Sheet 2 3m UNHensZe y 554;, WafiW Patented Mar. 2, 1948 2,436,&87

ELECTRICAL SOLDERING DEVICE WITH ATTACHMENT Urban N. Hensley, Reno, 111., assignor of forty per cent to Lloyd Alexander, Greenville, and eight per cent to Marvin M. Hensley, Reno, Ill.

Application December 27, 1944, Serial No. 569,940

3 Claims. (Cl. 219-26) My invention relates to electrical soldering devices with attachments.

This unit is designed to replace soldering'irons of the conventional type for heavy duty industrial soldering. The power unit is contained in a metal case convenient for carrying and contains a switch, current control, operating instructions and outlet jacks. The hand attachments each contain a length of welding cable which is plugged into a jack in the power unit. One of the hand units has a carbon electrode which is placed on the object to be soldered and the other has a bronze heating element which is placed on the other side of the object until it has been heated to the proper temperature. The solder is then applied to complete the job. Current flows through the solder when in contact with the objeot to be soldered, thus creating heat at the point of contact. This causes the solder to flow evenly and quickly.

My invention is illustrated by the accompanying drawings in which:

Figure 1 is a front elevation of the power unit;

Figure 2 is a wiring diagram of such unit;

Figure 3 shows the front portion of the unit in plan view and cables connected to the unit and having each a soldering attachment of a difierent type.

Figure 4 is a detail view of the attachment to the left of Figure 3, partly in section;

Figure 5 is a sectional detail view of the attachment shown at the right of Figure 3.

Figure 6 is a detail sectional view on line 6-6 of Figure 4;

Figure '7 is a detail sectional view on line 'l'! of Figure 5.

In a case I with a handle 2 and rounded off corners is arranged a step-down transformer T, consisting of a primary coil P, a core C and a secondary coil S and connectable to an A. C. supply of 115 volts. The connection may be established by the closing of an on-ofl? switch 3 the handle 3a of which is on the front of the case. The closing of the switch causes pilot light 4 mounted on the front face of the case to glow. Rotatably mounted on this front is switch arm 5 which may be set in any of three different positions, marked low, medium and high on the front wall of the case in which it connects with L, M, H (Figure 2). Contacts L, M, are connected to taps intermediate the ends of the primary while the third H is connected to the end tap of the primary. The central end of arm 5 is electrically connected to the contact of switch 3 and its position on any of the contacts L, M, H.

determines the effective turns ratio between the primary and secondary. The primary winding can be made with a single #10 copper wire with the low, medium and high taps at 184, 192 and 200 turns respectively. The transformer is wound on a standard type core C; said transformer being of a standard type which, with allowances for the variations effected by the current control arm 5, will have an output of approximately 400 watts, at approximately 4 or 6 volts. Heavy wire permits the transformer to operate cooler. The transformer is designed to produce low voltage and high amperage. The current control will permit satisfactory results when soldering light or heavy work. On the front wall are jacks B, I each connected to the end of an insulated cable 8 or 9 of size No. 6 to prevent overheating. The former is also connected to an electrode shown in detail in Figure 4 and having a hand grip 19, made of plastic and hollowed longitudinally to permit the insertion of the cable the end of which is secured to the large soldering lug H which is apertured to pass a screw bolt l2 on which a hex nut I3 is threaded to press the apertured portion of the soldering lug against an assembly unit comprising stud M of bolt [2, cooling fin l5, carbon clamp l8. Carbon I1 is clamped in the clamp and measures about 1" x 1" x The cooling fins prevent the hand grips from getting hot. The soldering lug II is located in a handle recess 18 the axis of which forms an acute angle with the hole for the cable, communicates with a hole !9 extending outwardly of the handle. A cap unit 20 having a cap 2| larger than the hole extends into the same and is threaded upon bolt l2.

Cable 9 carries at its other end the soldering device of Figure 5, '7, having a hand grip 22, hollowed like the handle of Figure 4 and of plastic material. The end of cable 9 embedded in the hollow of hand grip 22 is secured to soldering lug 23 which has an apertured portion through which passes a screw 24 screwed into a copper or bronze strip 25. Screws 26 are provided to secure the handle to the strip which has an angular extension 21. The latter serves as a support for a laterally extending flat bronze unit 28 for heating work before applying solder. A cover 29 is secured by flush type screws 29a to the strip 25 so as to leave a space between the angular extension 2''! and the end of the top wall of cover 29 for the solder rod 30, the lower end of which extends through a hole 3| in the cover registering with the space. The cover 29 is of one piece construction plastic or metal. Within the cover are out departing from the spirit or scope of the in-' vention as hereinafter defined by the appended claims.

1. In a soldering assembly a power unit, apair of soldering electrodes connectalole -to the power unit, both having hollowed handles for the end of the means connecting them to the unit, one of the electrodes having a stud bolt extending through the handle the stud of which carries cooling fins, a clamp and carbon in the clamp the oth r electrode comprisin a bronze or copper strip mounted to the handle and connect d to the connecting means, a cover secured to the strip with apert r s f r a soldering rod, a h a in unit carried by the handle of the second electrode.

2- n a l ing st ucture, a pair at cable means having each one end for connection to a source .of power and the other end .for connection to an electrode, two electrodes, both having hollowed handles of plastic materialyfor the last named ends of the cable means, and soldering lugs secured to such ends, one .of the electrodes having its soldering lug .apertured for the passage of a stud-bolt, the stud of which carries cooling fins and a clamp and carbon in the clamp,

the other electrode having a bronze or copper strip to which the soldering lug is secured, heating means supported by the strip, a cover secured to the strip and apertured for the passage of a solder rod, springs extending from the strip bearing against such rod.

,3. in a soldering structure, a pair of cable means each having one end for connection to a source of power and the other end for connection to an electrode, two electrodes, both having hollowed handle Qf plastic material for the last named ends of the cable means and soldering lugs secured to such ends, one of the electrodes having its soldering .lug apertured for the passage of .a stud-bolt passing through the handle and "carrying within the latter a nut for forcing the REFERENCES CITED The following references are of record in the file of this patent:

STATES PATENTS Name Date Buettell May 27, 1941 Number 

